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Title: X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities

Abstract

At large laser faculties, such as OMEGA and the National Ignition Facility (NIF), x-ray spectrometers are provided by the facility to diagnose plasma conditions or monitor backlighters. Often the calibration of these spectrometers is unknown or out of date. In response to this situation, we present a simple ray trace method to calibrate flat crystal spectrometers using only basic information regarding the optical design of the spectrometer. This model is then used to output photometric throughput estimates, dispersion, solid angle, and spectral resolution estimates. This model is applied to the mono angle crystal spectrometer and Super Snout I at the NIF and the X-Ray Spectrometer at the OMEGA laser facility

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [2]; ORCiD logo [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Rochester, NY (United States). Lab. for Laser Energetics
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1545520
Alternate Identifier(s):
OSTI ID: 1477142
Grant/Contract Number:  
AC52-07NA27344; 18-ERD-015
Resource Type:
Accepted Manuscript
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 89; Journal Issue: 10; Journal ID: ISSN 0034-6748
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Thorn, D. B., Coppari, F., Döppner, T., MacDonald, M. J., Regan, S. P., and Schneider, M. B. X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities. United States: N. p., 2018. Web. doi:10.1063/1.5039423.
Thorn, D. B., Coppari, F., Döppner, T., MacDonald, M. J., Regan, S. P., & Schneider, M. B. X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities. United States. doi:10.1063/1.5039423.
Thorn, D. B., Coppari, F., Döppner, T., MacDonald, M. J., Regan, S. P., and Schneider, M. B. Thu . "X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities". United States. doi:10.1063/1.5039423. https://www.osti.gov/servlets/purl/1545520.
@article{osti_1545520,
title = {X-ray spectrometer throughput model for (selected) flat Bragg crystal spectrometers on laser plasma facilities},
author = {Thorn, D. B. and Coppari, F. and Döppner, T. and MacDonald, M. J. and Regan, S. P. and Schneider, M. B.},
abstractNote = {At large laser faculties, such as OMEGA and the National Ignition Facility (NIF), x-ray spectrometers are provided by the facility to diagnose plasma conditions or monitor backlighters. Often the calibration of these spectrometers is unknown or out of date. In response to this situation, we present a simple ray trace method to calibrate flat crystal spectrometers using only basic information regarding the optical design of the spectrometer. This model is then used to output photometric throughput estimates, dispersion, solid angle, and spectral resolution estimates. This model is applied to the mono angle crystal spectrometer and Super Snout I at the NIF and the X-Ray Spectrometer at the OMEGA laser facility},
doi = {10.1063/1.5039423},
journal = {Review of Scientific Instruments},
number = 10,
volume = 89,
place = {United States},
year = {2018},
month = {10}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1 FIG. 1: Setup of geometry of a flat crystal spectrometer. It is important to keep track of positive and negative angles. Here the positive angle goes counter clockwise. For a detector that is normal to the x axis, the angle is −$π$/2.

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